Did the dumb thing as the title says, was distracted getting ready for a fishing trip last week and put def in my fuel tank, after I realized what I was doing i immediately yanked it out but not after about 1/4 of the bottle went in. I immediately started preparing to get truck towed to Ford dealership to get everything cleaned out but with the little bit of preparation I had to do get in the cab to pop the hood and pull fuel pump fuse and put truck In neutral the system already primed and the dealer called me and said they found crystals all the way to the injectors, I called insurance company and they came out yesterday and covered the claim. This was a $15,000.00 mistake and I hope to never do this again. I’m trying to get ready for the eufaula regional in a few weeks and msn now I’m on a real time crucible as they have to put a whole new fuel system on my truck. Just goes to show what a little distraction can make happen